Business Segment Information (Details) (USD $)	12 Months Ended
	Mar. 31, 2014 Customer Segment		Mar. 31, 2013 Customer		Mar. 31, 2012 Customer
Business Segment Information [Abstract]
Number of operating segments	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 24,577,000		$ 22,418,000		$ 20,562,000
Long-lived assets	998,000		1,033,000
Number of major customers	0		0		0
Percentage of sales considered for major customer (in hundredths)	10.00%		10.00%		10.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,042,000		16,401,000		13,854,000
Long-lived assets	379,000		434,000
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,485,000		2,189,000		1,929,000
Long-lived assets	4,000		5,000
All Other Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,050,000	[1]	3,828,000	[1]	4,779,000	[1]
The Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 615,000		$ 594,000

[1] No other foreign country accounts for 10% or more of the consolidated net sales